CN112324362B - Positive and negative rotation automatic detachable drill rod - Google Patents
Positive and negative rotation automatic detachable drill rod Download PDFInfo
- Publication number
- CN112324362B CN112324362B CN202011116197.7A CN202011116197A CN112324362B CN 112324362 B CN112324362 B CN 112324362B CN 202011116197 A CN202011116197 A CN 202011116197A CN 112324362 B CN112324362 B CN 112324362B
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- pin shaft
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- 239000012530 fluid Substances 0.000 claims abstract description 33
- 238000005553 drilling Methods 0.000 claims abstract description 21
- 230000002441 reversible effect Effects 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 14
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 9
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000009434 installation Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/043—Threaded with locking means
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a positive and negative rotation automatic detachable drill rod, which comprises a rod body, a male joint and a female joint, wherein fluid channels are arranged in the middle of the rod body, the male joint and the female joint, a bolt assembly is arranged at the end part of the male joint, the bolt assembly comprises a pin hole axially formed in the end part of the male joint, a pin shaft arranged in the pin hole and an elastic part, the elastic part has elastic force for axially retracting the pin shaft into the pin hole, a splicing hole is formed in the end part of the female joint, a pressure hole is formed in the male joint, and the pressure hole is used for enabling fluid to enter the pin hole to drive the pin shaft to slide outwards and be inserted into the splicing hole; the invention can control the circumferential locking and unlocking between the adjacent drill rods through the fluid, and the drill rods can be circumferentially locked to realize the alternate rotation of the drill rods. And the drilling machine can be unlocked circumferentially and reversely disassembled, so that the link of manual auxiliary disassembling and assembling is reduced, and the automatic construction efficiency of the drilling machine is improved.
Description
Technical Field
The invention relates to the technical field of mining machinery, in particular to a forward and reverse rotation automatic detachable drill rod.
Background
Rock burst is one of main disasters affecting coal mine safety production, and pressure relief drilling is an effective method for preventing and treating rock burst. Due to the particularity of the rock burst drilling process, accidents such as drill jamming and drill embracing are easy to happen, and at the moment, the drill rod needs to be reversely rotated to realize the jam releasing.
In the current drilling operation, the front drill rod and the rear drill rod are generally connected by conical threads. Thus, during drilling operations, the drill rod can only rotate in the forward direction. Under the influence of complex geological conditions, if the conditions of hole collapse, unsmooth slag discharge and the like occur, accidents such as drill jamming, drill holding and the like are easy to occur. At this time, if the drill rod is tried to be rotated forward and backward to relieve the drill clamping and the drill holding alternately, the drill rod is tripped, and the drill is lost. On the other hand, during the drilling construction process of the soft coal seam and the rock burst drilling, accidents such as drill sticking and the like are easy to happen. From the drilling process angle, the enhanced slag discharging and the releasing of stuck pressure can be realized through the positive and negative alternate rotation and the reciprocating hole sweeping of the drill rod, so that the occurrence of stuck and embracing of the drill is avoided.
In order to solve the problem of drill rod reversal, two major structural forms such as shape coupling and spline pair coupling appear in sequence. The shape connection is mostly realized by adopting a triangular prism, a hexagonal prism and other polyhedral surface structures in a plug-in connection mode for transmitting positive and negative bidirectional torque, and meanwhile, the shape connection is positioned by combining a pin for bearing the axial load of a drill rod; the spline pair is connected by adopting the matching of an inner spline and an outer spline, the circumferential torque is transmitted, and the axial load is still positioned by adopting pin connection. Although the connection mode can realize forward and backward bidirectional rotation of the drill rod, the assembly and disassembly process is complicated, the structure is complex, pins need to be manually assembled or disassembled when the drill rods are in butt joint, the assembly and disassembly are difficult to realize in an automatic mode, and the automatic construction efficiency of the drilling machine is seriously reduced.
In view of the above technical problems, there is a need for a drill rod capable of being automatically disassembled in forward and reverse rotation, which can realize automatic assembly and disassembly of the drill rod and improve the automatic construction efficiency of a drilling machine on the basis of realizing forward and reverse rotation of the drill rod.
Disclosure of Invention
In view of this, the invention provides a forward and reverse rotation automatic disassembly type drill rod, which can realize automatic assembly and disassembly of the drill rod on the basis of forward and reverse rotation of the drill rod, and improve the automatic construction efficiency of a drilling machine.
The invention relates to a positive and negative rotation automatic detachable drill rod, which comprises a rod body, a male joint connected to two ends of the rod body and a female joint used for being in threaded connection with the male joint, wherein the rod body, the male joint and the female joint are hollow structures to form a fluid channel which is axially communicated with each other and is communicated with the outside, the end part of the male joint is provided with a bolt assembly, the bolt assembly comprises a pin hole axially formed in the end part of the male joint, a pin shaft axially and slidably arranged in the pin hole and an elastic piece, the elastic piece has elastic force for enabling the pin shaft to axially retract into the pin hole, the end part of the female joint is provided with a plug hole matched with the pin shaft, a pressure hole for enabling the fluid channel to be communicated with the pin hole is formed in the male joint, and the pressure hole is used for enabling fluid to enter the pin hole to drive the pin shaft to outwards slide and be inserted into the plug hole.
Further, the pin hole axially penetrates through two axial ends of the male connector, the inner end part of the pin hole is sealed through a plug, the pin shaft is located on the axial outer side of the plug and axially seals and slides in the pin hole in a sleeved mode, the elastic piece is located between the plug and the pin shaft, and the pressure hole is communicated with a space, located between the pin shaft and the plug, in the pin hole.
Furthermore, a plurality of bolt assemblies are uniformly arranged on the end part of the male connector in the circumferential direction, a plurality of inserting holes matched with the pin shafts one by one are formed in the end part of the female connector, and a plurality of pressure holes communicated with the inserting holes are formed in the male connector.
Furthermore, the outer end part of the plug and the inner end part of the pin shaft are provided with grooves for accommodating two ends of the elastic part.
Furthermore, hanging shafts are radially fixed in the grooves, and two ends of the elastic piece are respectively hooked on the two hanging shafts.
Furthermore, a group of threaded mounting holes is radially formed in the groove, and two ends of the hanging shaft are in threaded connection with the two threaded mounting holes.
Furthermore, the hanging shaft is of a stepped shaft structure with two large ends and a small middle part, and the two ends of the hanging shaft are provided with thread sections with external threads.
Furthermore, the inserting hole is a waist-shaped hole.
Further, the male connector is of a stepped shaft structure with a small outer end and a large inner end, the small diameter section of the male connector is a tapered external thread connector with a gradually decreasing external diameter, and the bolt component is arranged at the shaft shoulder of the male connector.
Further, an annular sealing groove is formed in the outer circle of the pin shaft, and a sealing ring for sealing between the outer circle of the pin shaft and the inner circle of the pin hole is arranged in the sealing groove.
The invention has the beneficial effects that:
when fluid is injected into the fluid channel, the fluid enters the pin hole through the pressure hole to apply axial pressure to the pin shaft so as to drive the pin shaft to overcome the elastic force of the elastic piece to axially slide, the head of the pin shaft slides out of the pin hole and is inserted into the insertion hole to form circumferential locking for the male joint and the female joint, at the moment, when the drill rod rotates reversely, the adjacent drill rods cannot rotate to cause a drill tripping phenomenon, when the fluid pressure in the fluid channel is reduced and the pin shaft cannot overcome the elastic force, the pin shaft is driven by the elastic force of the elastic piece to retract into the pin hole, at the moment, when the drill rod rotates reversely, the adjacent drill rods can rotate relatively, the disassembly of the drill rod is facilitated, the structure of the drill rod is simple, the operation and the control are easy, the circumferential locking and the unlocking between the adjacent drill rods can be controlled through the common fluid in the drilling process, the drill rod can be circumferentially locked, the forward and reverse rotation and the reciprocating hole cleaning are realized so as to enhance the slag discharge, the blockage and the pressure relief, the drill rod holding and the reverse disassembly can be realized, the links of manual auxiliary disassembly of the drilling machine can be greatly improved, and the automatic disassembly of the drilling machine can be greatly.
Drawings
The invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic view of a female coupling structure;
FIG. 4 is a schematic sectional view of the female connector;
FIG. 5 is a schematic view of a male-female connector structure;
FIG. 6 is a schematic cross-sectional view of the male connector;
FIG. 7 is a schematic view of a pin structure;
FIG. 8 is a schematic cross-sectional view of the pin;
FIG. 9 is a schematic view of a hanger shaft structure;
FIG. 10 is a cross-sectional structural view of the hanger shaft;
FIG. 11 is a schematic view of a plug structure;
FIG. 12 is a schematic cross-sectional view of a plug;
FIG. 13 is a schematic view of a drill rod pin shaft embedding structure;
FIG. 14 is a schematic view of a drill rod pin separation structure;
Detailed Description
As shown in the figure: the forward and reverse rotation automatic disassembly type drill rod comprises a rod body 10, male connectors 20 connected to two ends of the rod body and female connectors 30 used for being in threaded connection with the male connectors, wherein the threaded connection of the male connectors and the female connectors means that the male connector of one drill rod is connected with the female connector of an adjacent drill rod, the male connector and the female connector on the same drill rod are not in direct mutual connection relation, the rod body, the male connectors and the female connectors are hollow structures and form a fluid channel 40 which is axially communicated with each other and is communicated with the outside, a plug pin assembly is arranged at the end part of each male connector and comprises a pin hole 21 axially arranged at the end part of each male connector, a pin shaft 22 axially slidably arranged in the pin hole and an elastic piece 23, the elastic piece has elastic force enabling the pin shaft to axially retract into the pin hole, an insertion hole 31 matched with the pin shaft is formed at the end part of each female connector, a pressure hole 27 enabling the fluid channel to be communicated with the pin hole is formed in each male connector, and the pressure holes are used for enabling fluid to enter the pin hole to drive the pin shaft to slide outwards and be inserted into the insertion hole.
The inner end parts of the male joint and the female joint are the ends close to the rod body in the axial direction, the outer end parts of the male joint and the female joint are the ends far away from the rod body in the axial direction, the fluid referred to here is liquid or gas, the rod body is of a tubular structure by combining the drawings shown in figures 1 and 2, and the rod body is made of high-strength wear-resistant seamless steel pipes; the pin shaft is made of high-strength alloy materials and used for ensuring the positioning insertion of the reverse rotation of the drill rod, and the outer end of the pin shaft is provided with a threaded hole I22b which is convenient for guiding the pin shaft to be installed in the pin hole; the male joint and the female joint are axially provided with through flow passages, wherein the diameter of the inner circle of the rod body is larger than that of the male joint and the female joint, the male joint and the female joint are welded at two ends of the rod body through friction welding, so that fluid passages which axially penetrate through the interior of the drill rods are formed, the drill rods are mutually connected, so that the fluid passages are sequentially connected to form the flow passages which extend into the drill holes, high-pressure liquid or gas can be injected into the drill holes through the flow passages, the male joint is provided with an external thread section, the female joint is provided with an internal thread hole, after the male joint of one drill rod is connected with the female joint of the other drill rod, the bolt assembly of the drill rod is matched with the plug hole of the other drill rod, and as shown in a combined figure 2 and a figure 6, the diameter of the pressure hole is smaller, the diameter of the pressure hole is axially arranged in the inner circle of the male joint and penetrates into the pin hole, when fluid is injected into the fluid passages, fluid enters the pin hole through the pressure hole and applies axial pressure to the pin shaft so as to drive the pin shaft to overcome the elastic force of the elastic part to axially slide, the head part of the pin shaft slides out of the pin hole and is inserted into the plug-in hole to form circumferential locking for the male joint and the female joint, at the moment, when the drill rod rotates reversely, the adjacent drill rods cannot rotate to cause the drill release phenomenon, when the fluid pressure in the fluid channel is reduced and the pin shaft cannot overcome the elastic force, the pin shaft is driven by the elastic force of the elastic part to retract into the pin hole, at the moment, when the drill rod rotates reversely, the adjacent drill rods can rotate relatively to facilitate the disassembly of the drill rods, the drill rod structure of the structure is simple in structure and easy to operate and control, the circumferential locking and the unlocking between the adjacent drill rods can be controlled through the commonly used fluid in the drilling process, the drill rod can be circumferentially locked, the positive and negative alternate rotation and the reciprocating hole sweeping are realized to enhance the slag discharge and the blockage and pressure relief, thereby avoiding the occurrence of drill blocking and the drill rod holding, and the drill rod can also be circumferentially unlocked and disassembled in a reverse direction, the link of manual auxiliary disassembly and assembly is reduced, the automatic disassembly of the drilling machine can be realized, and the automatic construction efficiency of the drilling machine can be greatly improved.
In this embodiment, the pin hole 21 axially penetrates through two axial ends of the male connector, the inner end of the pin hole is sealed by the plug 24, the pin shaft is located on the axial outer side of the plug and axially seals and slides in the pin hole, the elastic member is located between the plug and the pin shaft, and the pressure hole 27 is communicated with a space in the pin hole located between the pin shaft and the plug. As shown in fig. 5 and 6, the inner end of the pin hole is an internal threaded hole structure, and the end cap threads are screwed into the internal threaded hole to seal the end, and the internal threaded hole and the pin hole are required to maintain good coaxiality; the inner end part of the plug is provided with a threaded hole II24a for guiding the installation of the plug, and the plug and the pin shaft enable two ends in the pin hole to be sealed, so that fluid leakage can be prevented, and the fluid pressure can be kept conveniently to further reliably drive the pin shaft.
In this embodiment, a plurality of bolt assemblies are evenly provided in the circumference of the end portion of the male connector, the end portion of the female connector is provided with a plurality of inserting holes matched with the respective pin shafts one by one, and a plurality of pressure holes communicated with the respective inserting holes are formed in the male connector. With reference to fig. 3 and 5, in the present embodiment, six groups of the bayonet pin assemblies are provided, six bayonet holes are correspondingly formed in the female joint, and six pressure holes are correspondingly formed in the male joint, so that when adjacent drill rods are locked in the circumferential direction, the circumferential stress uniformity is improved, and further, the torque that the drill rods can bear is improved.
In this embodiment, the outer end of the plug and the inner end of the pin shaft are provided with grooves 28 for accommodating two ends of the elastic member. The recess is circular shape blind hole structure, and this structure can form the direction to the deformation of elastic component, prevents that the elastic component from heeling, also does benefit to the installation location of elastic component simultaneously.
In this embodiment, the hanging shafts 25 are radially fixed in the groove 28, and two ends of the elastic member are respectively hooked on the two hanging shafts. The elastic part adopts an extension spring, two ends of the extension spring are provided with circular hooks, and the two circular hooks are respectively hooked on the two hanging shafts and used for connecting and installing the extension spring.
In this embodiment, a set of threaded mounting holes 28a is radially formed in the groove, and two ends of the hanging shaft are in threaded connection with the two threaded mounting holes. As shown in fig. 8 and 12, two thread mounting holes are radially and oppositely formed in each groove, the two thread mounting holes can be both in a through hole structure or in a structure with one through hole and one blind hole, and the two ends of the hanging shaft are detachably connected in the two thread mounting holes through threads, so that the hanging shaft is favorably mounted and dismounted.
In this embodiment, the hanging shaft is a stepped shaft structure with two large ends and a small middle part, and the two ends of the hanging shaft are provided with thread sections 25a with external threads. The hanging shaft middle part minor diameter section does benefit to the hanging shaft middle part and passes the screw thread mounting hole, the installation of the hanging shaft of being convenient for, and the hanging shaft middle part also is regarded as the hookup position of stay cord spring simultaneously, and the both ends face of hanging shaft is equipped with 4 elongated hole 25b for the installation location.
In this embodiment, the insertion hole 31 is a kidney-shaped hole. The length direction of the waist-shaped hole is consistent with the circumferential direction of the end face of the female joint, the arrangement of the waist-shaped hole can increase the error tolerance of the circumferential relative position of the male joint and the female joint of another drill rod, the reliable insertion connection of a pin shaft is facilitated, and the drill rod is prevented from tripping when being reversed.
In this embodiment, the male joint is a stepped shaft structure with a small outer end and a large inner end, the small diameter section of the male joint is a tapered male connector with a gradually decreasing outer diameter, and the pin assembly is disposed at a shoulder of the male joint. The end part of the female joint is provided with a conical internal thread hole, the insertion holes are formed in the end part of the female joint and distributed circumferentially around the internal thread hole, and the male joint with the structure is not only favorable for being connected with the female joint for assembly, but also convenient for installation and positioning.
In this embodiment, the outer circle of the pin shaft is provided with an annular sealing groove 22a, and a sealing ring 26 for sealing between the outer circle of the pin shaft and the inner circle of the pin hole is arranged in the sealing groove. The sealing ring is made of rubber, and the sliding sealing of the pin shaft in the pin hole is realized through the rubber ring;
as shown in connection with fig. 13, the automatic drill-up process: the drill rod I60 is clamped by a drilling machine clamp, the drill rod II50 is used as an upper drill rod, and the male joint of the drill rod II50 is screwed into the female joint of the drill rod I60 through the rotary propulsion of the drill rod II50, so that the screwing of the drill rod I60 and the drill rod II50 is completed. And then introducing fluid from the tail part of the drill rod II50, wherein the fluid flows into the pin hole from the pressure hole in the male joint through the interior of the drill rod II50, and the fluid pushes the pin shaft to extend out, so that the pin shaft is inserted into the insertion hole of the female joint of the drill rod I60, the drill rod II50 and the drill rod I60 are connected, the reverse torque can be borne through the pin shaft, and the forward torque and the axial stress can be borne through the conical thread structure of the male joint, so that the automatic drilling of the drill rod is completed.
As shown in fig. 14, the automatic drill unloading process: the drill rod I60 is in a state of being clamped by a drill machine clamping device, the drill rod II50 is used as a drill unloading drill rod, the fluid stops supplying, and under the reset action of the elastic piece 23, the pin shaft of the drill rod II50 is withdrawn from the inserting hole of the female joint of the drill rod I60 and retracts to the initial state. At the moment, the drill rod II50 and the drill rod I60 are separated from a reversible state; and then the male joint of the drill rod II50 is screwed out of the female joint of the drill rod I60, so that the drill rod II50 and the drill rod I60 are completely separated, and the automatic drill unloading of the drill rod is completed.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. The utility model provides a but just reversing automatic disassembly formula drilling rod which characterized in that: the bolt assembly comprises a rod body, male connectors connected to two ends of the rod body and a female connector used for being in threaded connection with the male connectors, the rod body, the male connectors and the female connector are of hollow structures and form fluid channels which are axially communicated with each other and are communicated with the outside, a bolt assembly is arranged at the end portion of the male connector and comprises a pin hole axially formed in the end portion of the male connector, a pin shaft and an elastic piece axially and slidably arranged in the pin hole, the elastic piece has elastic force enabling the pin shaft to axially retract into the pin hole, a plug hole matched with the pin shaft is formed in the end portion of the female connector, a pressure hole enabling the fluid channels to be communicated with the pin hole is formed in the male connector, and the pressure hole is used for enabling fluid to enter the pin hole and further driving the pin shaft to slide outwards and be inserted into the plug hole.
2. The forward and reverse rotation automatic detachable drill rod as claimed in claim 1, wherein: the pin hole axially penetrates through two axial ends of the male connector, the inner end part of the pin hole is sealed through the plug, the pin shaft is located on the axial outer side of the plug and is axially sealed and slidably sleeved in the pin hole in a sliding mode, the elastic piece is located between the plug and the pin shaft, and the pressure hole is communicated with a space, located between the pin shaft and the plug, in the pin hole.
3. The positive and negative rotation automatic detachable drill rod according to claim 1, characterized in that: the end part of the male connector is uniformly provided with a plurality of bolt assemblies in the circumferential direction, the end part of the female connector is provided with a plurality of inserting holes matched with the pin shafts one by one, and a plurality of pressure holes communicated with the inserting holes are formed in the male connector.
4. The positive and negative rotation automatic detachable drill rod according to claim 2, characterized in that: and grooves for accommodating two ends of the elastic part are formed in the outer end part of the plug and the inner end part of the pin shaft.
5. The forward and reverse rotation automatic detachable drill rod as claimed in claim 4, wherein: hanging shafts are radially fixed in the grooves, and two ends of the elastic piece are respectively hooked on the two hanging shafts.
6. The positive and negative rotation automatic detachable drill rod according to claim 5, characterized in that: a group of threaded mounting holes are radially formed in the groove, and two ends of the hanging shaft are in threaded connection with the two threaded mounting holes.
7. The positive and negative rotation automatic detachable drill rod according to claim 6, characterized in that: the hanging shaft is of a stepped shaft structure with two large ends and a small middle part, and the two ends of the hanging shaft are threaded sections with external threads.
8. The positive and negative rotation automatic detachable drill rod according to claim 1, characterized in that: the plug hole is a waist-shaped hole.
9. The positive and negative rotation automatic detachable drill rod according to claim 1, characterized in that: the male connector is of a stepped shaft structure with a small outer end and a large inner end, the small diameter section of the male connector is a tapered external thread connector with a gradually reduced external diameter, and the bolt component is arranged at the shaft shoulder of the male connector.
10. The positive and negative rotation automatic detachable drill rod according to claim 2, characterized in that: the outer circle of the pin shaft is provided with an annular sealing groove, and a sealing ring for sealing the outer circle of the pin shaft and the inner circle of the pin hole is arranged in the sealing groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011116197.7A CN112324362B (en) | 2020-10-18 | 2020-10-18 | Positive and negative rotation automatic detachable drill rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011116197.7A CN112324362B (en) | 2020-10-18 | 2020-10-18 | Positive and negative rotation automatic detachable drill rod |
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| CN112324362A CN112324362A (en) | 2021-02-05 |
| CN112324362B true CN112324362B (en) | 2022-11-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114183080B (en) * | 2021-12-08 | 2024-03-22 | 中国矿业大学 | Forward and reverse rotation automatic disassembly drill rod capable of transmitting large torque and operation method |
| CN114776265A (en) * | 2022-03-29 | 2022-07-22 | 中煤科工集团西安研究院有限公司 | Flexible inserting device and method for sieve tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10129064A1 (en) * | 2001-06-15 | 2002-12-19 | Hilti Ag | rock drilling |
| CN101701511B (en) * | 2009-09-29 | 2012-01-25 | 山东墨龙石油机械股份有限公司 | Sucker rod anti-tripping connecting device and manufacturing method thereof |
| CN102322226B (en) * | 2011-06-02 | 2013-06-26 | 杭州电子科技大学 | Self-locking and unlocking device for sampling pipe joints of hollow stems for soft formations |
| CN104948120B (en) * | 2015-07-02 | 2017-07-07 | 江苏和信石油机械有限公司 | A kind of radial direction locking type ocean drill rod threaded nipple |
| CN110374521B (en) * | 2019-08-07 | 2020-10-23 | 中煤科工集团重庆研究院有限公司 | Mining positive and negative rotation automatic dismounting type drill rod |
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